how to use adafruit trinket 5v with arduino ide

If that number of I/O sounds a little low to you, then there is more bad news: two of them are also used for USB communication. You can also set the 3.3 V version to 16 MHz, though as outlined here, this isn’t officially supported, and may not run properly. By default, the ATtiny85 runs at 8 MHz, however the 5 V version can be set to 16 MHz if you prefer.

Though they mostly function in the same manner, the 3.3 V version is actually slightly smaller at 27 mm x 15 mm versus the slightly “less tiny” 5 V footprint of 31 mm x 15.5 mm. Two versions are available, one with 5 V logic and 3.3 V logic.

The board features an ATtiny85 microcontroller for processing, giving it 8K of flash memory and five available I/O pins. Of course you could turn to the Arduino Nano, as it is quite small, but if you only need a limited number of I/O, in an even smaller package, the tiny Adafruit Trinket could be exactly what you’re looking for!

When you start a maker project, if you need programmatic control, you may turn to an Arduino board, such as the Uno or Mega, but in many situations, something much smaller would work be preferable.

How to use adafruit trinket 5v with arduino ide